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Sound. Science - Sound.

Tamil Nadu Board - STD 8 - Science (Tamil - English Medium). 88 questions in this chapter.

Question types

Sound. question types

88 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

88
Questions
9
Question groups
5
Question types
Sample Questions

Sound. questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M C Q1 Mark
Bats produce ……………….. sound during screaming.
  • A
    infrasonic
  • ✓
    ultrasonic
  • C
    noise
  • D
    none

Answer: B.

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Q 2M C Q1 Mark
……………….. instruments produce a specific sound when they are struck, scrapped or clashed together.
  • A
    Reed
  • B
    Stringed
  • ✓
    Percussion
  • D
    None

Answer: C.

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Q 3M C Q1 Mark
The time taken for one complete vibration is called its ………………..
  • A
    loudness
  • B
    pitch
  • ✓
    time period
  • D
    frequency

Answer: C.

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Q 4M C Q1 Mark
The voices of men, women and children differ because of difference in their ………………..
  • A
    lungs
  • ✓
    vocal cords
  • C
    larynx
  • D
    wind pipe

Answer: B.

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Q 5M C Q1 Mark
The hearing range of human ear is ………………..
  • ✓
    20 Hz to 20 kHz
  • B
    less than 20 Hz
  • C
    more than 20 k Hz
  • D
    none

Answer: A.

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Q 16Assertion & Reason1 Mark
Assertion: Women have shriller sound than men.
Reason: Men produced higher frequency sound than women.
  • A
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • ✓
    Assertion is true but reason is false.
  • D
    Assertion is false but reason is true.

Answer: C.

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Q 17Assertion & Reason1 Mark
Assertion: Trees should be planted along the road to control noise pollution.
Reason: Trees act as noise buffers.
  • ✓
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    Assertion is true but reason is false.
  • D
    Assertion is false but reason is true.

Answer: A.

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Q 18Assertion & Reason1 Mark
AssertIon: We cannot hear the sound produced by a vibrating pendulum.
Reason: The frequency of the pendulum is very less.
  • ✓
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    Assertion is true but reason is false.
  • D
    Assertion is false but reason is true.

Answer: A.

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Q 19Assertion & Reason1 Mark
Assertion: Sound waves do not travel through vacuum.
Reason: The speed of sound Is too small when compared to speed of light.
  • A
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • ✓
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    Assertion is true but reason is false.
  • D
    Assertion is false but reason is true.

Answer: B.

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Q 20Assertion & Reason1 Mark
Consider the statement given below and choose the correct option.
Assertion: Two persons on the surface of the moon cannot talk to each other.
Reason: There is no atmosphere on the moon.
  • A
    Both assertion and reason are true and the reason is the correct explanation of assertion.
  • B
    Assertion is true but reason is false.
  • C
    Assertion is false but reason is true.
  • D
    Both Assertion and reason are false.
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Q 31Match The Following.4 Marks
Match the following.
Ultrasonics Frequency below 20Hz
Speed of sound in air Needs material medium
Infrasonics 330ms-1
Sound propagation Frequency more than 20000 Hz
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Q 35[7 marks Questions]7 Marks
Cross - word puzzle :
Clues :
Across :
2. The bouncing back of sound wave when it strikes a hard surface.
4. Form of matter of fixed shape other than liquid or gas.
6. Maximum distance moved by a vibrating body form its position of rest.
8.Waves which need a material medium for its propagation.
10. A kind of raepid to and fro motion of an object.

Down:
1. A unit used to measure the loudness or intensity of sound.
3. Sound wave whose frequency is too high to be heard by humans.
5. Sound wave whose frequency is too low to be heard by humans.
7. A reflection of sound.
9. The branch of science deals with the study of seismic waves.
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